Gatsby is a React-based, GraphQL powered, static site generator. What does that even mean? Well, it weaves together the best parts of React, webpack, react-router, GraphQL, and other front-end tools in to one very enjoyable developer experience. Don’t get hung up on the moniker ‘static site generator’. That term has been around for a while, but Gatsby is far more like a modern front-end framework than a static site generator of old.
You code and develop your site, Gatsby transforms it into a directory with a single HTML file and your static assets. This folder is uploaded to your favorite hosting provider, and voila.
Overall think, part Jekyll, part create-react-app.
Source: What is Gatsby.js | Mediacurrent
Looks like I need to take a peek at Gatsby.js and see what’s going on there. Most intriguing are features to leverage APIs on existing CMS’s to pull the content and display it with a new more modern front-end.